Evolution of temporal coherence in confined exciton-polariton condensates
journal contributionposted on 19.02.2018, 13:46 by M. Klaas, H. Flayac, M. Amthor, I.G. Savenko, S. Brodbeck, Tapio Ala-NissilaTapio Ala-Nissila, S. Klembt, C. Schneider, S. Hofling
© 2018 American Physical Society. We study the influence of spatial confinement on the second-order temporal coherence of the emission from a semiconductor microcavity in the strong coupling regime. The confinement, provided by etched micropillars, has a favorable impact on the temporal coherence of solid state quasicondensates that evolve in our device above threshold. By fitting the experimental data with a microscopic quantum theory based on a quantum jump approach, we scrutinize the influence of pump power and confinement and find that phonon-mediated transitions are enhanced in the case of a confined structure, in which the modes split into a discrete set. By increasing the pump power beyond the condensation threshold, temporal coherence significantly improves in devices with increased spatial confinement, as revealed in the transition from thermal to coherent statistics of the emitted light.
This work was supported by the State of Bavaria. T.A-N. has been supported in part by the Academy of Finland through its CoE grants 251748 and 284621. I.G.S. has been supported by IBS-R024-D1, the Australian Research Council’s Discovery Projects funding scheme (project DE160100167), and the Dynasty Foundation.
- Mathematical Sciences